Kontron AM5020 uEFI BIOS Manual do Utilizador descarregar pdf (Página 61)

AM5020 uEFI BIOS The uEFI Shell

ID 1045-0247, Rev. 1.0 Page 55

P R E L I M I N A R Y

6.3.3.4 Enable Watchdog and Control PXE Boot

The uEFI Shell provides environment variables used to control the execution flow.

The following sample start-up script shows two uEFI Shell environment variables,

wdt_enable and pxe_first, used to control the boot process and the Watchdog.

To create uEFI Shell environment variables, use the set uEFI Shell command as shown below:

echo -off

echo “Executing sample startup.nsh...”

if %wdt_enable% == “on” then

kwdt -t 15

echo “Watchdog enabled”

endif

if %pxe_first% == “on” then

echo “forced booting from network”

kboot -t network

endif

Shell> set wdt_enable on

Shell> set pxe_first on

Shell> set

pxe_first : on

wdt_enable : on

Shell> reset

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Kontron AM5020 uEFI BIOS Manual do Utilizador Página 61